Crime maps have just come to the UK -- but their use was pioneered in San Francisco, as Hans Rosling discovered. (Plotting San Francisco's crimes onto a topographical map revealed a surprising factor in crime rates: where you are on a hill.)(Part 1 of 6)

Documentary which takes viewers on a rollercoaster ride through the wonderful world of statistics to explore the remarkable power they have to change our understanding of the world, presented by superstar boffin Professor Hans Rosling, whose eye-opening,